The settlement alert siren may be active after import. Just run up to the top of the structure and turn it off.

The Boston Airport settlement has default limitations imposed by the game - most importantly, no crops and no recruitment beacons are allowed. You will have to send settlers to this settlment from other settlements to populate it.

The game sometimes respawns the ashtrays that are laying all around the settlement when you discover it even after scrapping or storing them. Not a bug or issue with the blueprint or Transfer Settlements.

There are 2 switches on the garage door in this blueprint - inside and outside. Both must be off to close the door. Only one must be on to open it.

When the import is complete, in order to restore navmeshing/settler pathing and make the settlement work as it should, you must save your game and then load the save. Then travel away from the settlement and either wait, sleep, or pass time in the game doing other things. When you save the first time after import, it is possible it will take several minutes and your game will seem like it's frozen. If this happens, it's not frozen, just let it do its thing. This is a one-time thing. CDante, the mod author of Transfer Settlements, also strongly recommends that you not attempt to build or modify parts of the settlement until you've completed the save/load/wait procedure.

NOTE ABOUT FILE LOCATIONS:

This settlement installs to blueprint slot 1 by default. If you want it in a different slot then navigate to C:\Program Files (x86)\Steam\steamapps\common\Fallout 4\Data\F4SE\Plugins\TransferSettlements\blueprints\1 and manually move the .json file into an empty folder named with a number 1-10 in C:\Program Files (x86)\Steam\steamapps\common\Fallout 4\Data\F4SE\Plugins\TransferSettlements\blueprints . If you already have another blueprint in slot 1 then you are advised to delete or move one of the two files.

MY OTHER SETTLEMENT BLUEPRINTS:

All of my settlement blueprints are updated for Transfer Settlements 1.41, which means power connections will work automatically!

Blueprints with this badge are confirmed Vanilla Blueprints which were built using only settlement objects from the main game and official DLC. No settlement objects from 3rd-party mods or the Creation Club are used in these blueprints. F4SE, HUD Framework, and Transfer Settlements are the only mods required to use them.

Blueprint creators who display this badge are part of the Vanilla Settlement Blueprints Association, a group of creators who offer high-quality and mod-free settlement blueprints. This group does not burden users by forcing them to track down and install endless mods in order to import a blueprint.